Sunday's Yankees/Red Sox tilt featured a 10th-inning go-ahead single by Pedro Ciriaco. There's been only one other go-ahead hit by a Bostonian, in extra innings, in the Bronx, over the past eight years: Jacoby Ellsbury's 14th-inning homer on Sept. 25. And it was the first non-home run version of such a hit since April 22, 2001, when Jason Varitek singled off Mariano Rivera in the 10th, driving in Trot Nixon from second.

Anthony Rizzo hit the Cubs' second walk-off homer of the season on Sunday to beat those hated Cardinals 4-2. It's the first time Chicago has defeated St. Louis via walk-off homer since Aramis Ramirez took Dennys Reyes deep in April 2009.

Milwaukee's Corey Hart homered in the bottom of the 10th against Washington on Sunday as well. His, unfortunately, was not a walk-off because the Nationals had scored twice in the top of the 10th. Hart finished 4-for-5, including an extra-inning homer, in a home game that his team still managed to lose (in this case, by an 11-10 score). He's the first player to do that since Sept. 7, 2004, when Corey Patterson of the Cubs launched his second homer of the game in the bottom of the 12th in a 7-6 loss to Montreal.It was a dubious first in Brewers franchise history.

The Athletics on Friday won their second 15-inning game in the span of five days.

Oakland is still very much in the walk-off business, securing their 12th of the season with a sacrifice fly by Jemile Weeks on Monday -- in the bottom of the 15th. By inning, it was the latest "sac-fly-off" since Raul Ibanez brought an end to that 19-inning game between the Phillies and Reds last season. It was Oakland's first walk-off sac fly since Rickey Henderson‘s 15th-inning winner to beat Toronto on May 23, 1981.

The Athletics played 15 more innings on Friday night against Toronto, and won on another sacrifice fly (by Coco Crisp) in the bottom of the 15th. Oakland leads the majors in walk-off wins with 13. The Nationals have eight. No team, by the way, has ever had two "sac-fly-offs" in the 15th or later in the same season.

After surrendering three runs in the top of the 10th on Wednesday, Texas walked off with an 11-10 victory over the Angels on Elvis Andrus' two-run single to cap a four-run rally. It was the most runs the Rangers had scored in an extra inning since May 5, 2009, when they put up a six-spot in the 10th at Seattle. Andrus hit the first walk-off single, with his team trailing in extras, of the season. And it was the first single to turn an extra-inning deficit into an extra-inning walk-off, in Rangers/Senators franchise history.

Justin Morneau (4-for-4, HBP) and Jamey Carroll (4-for-4, walk, go-ahead single in the 10th) both had "perfect" days at the plate for Minnesota. The Twins are the only team this season to have two players each record four-plus hits and a hit in every at-bat. Ben Revere and Ryan Doumit both did it on June 22 in Cincinnati.

Statistical support for this column provided by Baseball-Reference.com and the Elias Sports Bureau.